| Aspire Fitness Studios Ltd | Darlington | 2013 |
| Aspire Graphix Ltd | Brough | 2019 |
| Aspire Gymnastics Limited | Lancaster | 2022 |
| Aspire Gyms Limited | Chorley | 2013 |
| Aspire Hair Design Ltd | Swadlincote | 2013 |
| Aspire Health and Fitness Limited | Morpeth | 2018 |
| Aspire Horizons TLE Limited | New Mills | 2022 |
| Aspire in Arts CIC | Nuneaton | 2015 |
| Aspire Judo Academy Ltd | Ingleby Barwick | 2022 |
| Aspire Life Ltd | Bournemouth | 2021 |
| Aspire Live Ltd | Barnet | 2025 |
| Aspire Media Group Investments Ltd | Colchester | 2009 |
| Aspire Music Limited | Leamington Spa | 2024 |
| Aspire Padel Ltd | London | 2025 |
| Aspire Racing Limited | Farnham | 2010 |
| Aspire Running Events Limited | Cardiff | 2014 |
| Aspire School of Dance Limited | Lancaster | 2019 |
| Aspire South West Limited | Hayle | 2013 |
| Aspire Sport Hastings Limited | Bexhill-On-Sea | 2023 |
| Aspire Sports & Cultural Trust | Tunbridge Wells | 2008 |
| Aspire Sports Coaching Academy Limited | High Peak | 2008 |
| Aspire Sports Trust | Birmingham | 2013 |
| Aspire Sports UK Limited | Merseyside | 2005 |
| Aspire Strength & Conditioning Limited | Southend-On-Sea | 2024 |
| Aspire Taekwondo Ltd | Barnsley | 2020 |
| Aspire Tennis Limited | London | 2023 |
| Aspire VOX Limited | Dundee | 2016 |
| Aspire Wellness Community Ltd | Northampton | 2012 |
| Aspire Wrestling C.I.C. | Derby | 2025 |
| ASPIRE1 Group Ltd | Sheffield | 2026 |
| ASPIRE2 Limited | Winchester | 2002 |
| Aspirefit Ltd | Shepperton | 2020 |
| Aspirefootballcoaching Ltd | Basildon | 2024 |
| Aspiremedia Productions Limited | Milton Keynes | 2014 |
| Aspiria Ltd | London | 2026 |
| Aspiring Sports Ltd | Ilkley | 2025 |
| Aspley Guise and Woburn Sands Golf Club Limited | Milton Keynes | 1953 |
| Aspr Networks Ltd | Bury St. Edmunds | 2025 |
| Asprey Studio Limited | London | 2023 |
| Asprod Ltd | Liverpool | 2021 |
| Aspull Rugby Football Club Limited | Wigan | 2013 |
| Aspull Sports Performance Ltd | Ormskirk | 2026 |
| Asquared Padel Ltd | Cambridge | 2025 |
| Asrk Athletics Limited | London | 2021 |
| Assaf Frank Ltd | St. Albans | 2002 |
| Assassin Events Limited | Porstmouth | 2024 |
| Assassin Goods Limited | Penrith | 2017 |
| Assassins Amateur Boxing Glasgow CIC | Glasgow | 2025 |
| Assassins Boxing Gym Ltd | Glasgow | 2025 |
| Assassins Gym Ltd | East Sussex | 2013 |
| Assassins Thai Boxing Limited | Crowborough | 2023 |
| Assata Taught ME Play Ltd | London | 2026 |
| Assault Courses UK Ltd | Galston | 2014 |
| Assault Your Senses Ltd | Bury St Edmunds | 2015 |
| Assaya Limited | Bude | 2019 |
| Assemble Talent Ltd | London | 2014 |
| Assembled Moments Ltd | Kington | 2024 |
| Assembly Festival Limited | Edinburgh | 2013 |
| Assembly House CIC | Leeds | 2014 |
| Assembly Line International C.I.C. | Smethwick | 2017 |
| Assembly Line Productions Limited | Leeds | 2019 |
| Assembly of Creative Arts C.I.C. | Northwood | 2014 |
| Assembly Theatre Limited | Edinburgh | 1985 |
| Assembly Wings Ltd | Glasgow | 2020 |
| Asset Design Studio Ltd | Sevenoaks | 2012 |
| Asset Vault Competitions Ltd | South Croydon | 2025 |
| Assilia Football Group Limited | London | 2025 |
| Assmbly Tickets Ltd | Bristol | 2026 |
| Associate Events Limited | Leicester | 2010 |
| Associated Board of Dance Ltd | Birmingham. | 2012 |
| Associated Decorating Contractors Limited | London | 2006 |
| Associated Musical Services Limited | Attleborough | 1994 |
| Associated Theatres Ltd | Cirencester | 2020 |
| Associated Trade & Technology Limited | East Sussex | 1990 |
| Association Haize D'Issia UK | London | 2015 |
| Association of Amateur Mixed Martial Arts Ltd | Wisbech | 2022 |
| Association of British Mountainbike Guides | Ipswich | 2016 |
| Association of British Theatre Technicians (the) | London | 1975 |
| Association of Chinese Sport Art & Culture | London | 2023 |
| Association of Independent Museums | Ellesmere Port | 1978 |
| Association of Land Rover Clubs Limited | Redditch | 1984 |
| Association of Model Railway Clubs Wales and West of England Limited(The) | Malvern | 1979 |
| Association of Northern Ireland Car Clubs Limited | Carrickfergus | 2023 |
| Association of Running Clubs | Dorking | 2007 |
| Association of UK Course Measurers | Alresford | 2017 |
| Associazione Amici Teatro Italiano Manchester | Manchester | 2022 |
| Assra Limited | Kent | 1988 |
| Assured Gaming Limited | Stockton-On-Tees | 2016 |
| Assured Productions Limited | Sheffield | 2010 |
| Assured Services 1923 Ltd | Colchester | 2018 |
| Assynt Foundation | Lairg | 2004 |
| AST Fitness Ltd | Stirling | 2020 |
| AST Football Management Ltd | Salford | 2020 |
| AST Sports Agency Ltd | London | 2017 |
| Asta Partners Ltd | London | 2020 |
| Astar Space Ltd | Billericay | 2026 |
| Astarcampltd Limited | London | 2022 |
| Astarla Ltd | Shaftesbury | 2024 |
| Astars Academy Limited | Barnet | 2024 |
| Astbury Golf Club Limited(The) | Congleton | 1925 |